Dia-Compe Gran Compe 1 Inch Steel Threaded Headset

£14.99 Please note this product has selling restrictions to your country. was
Manufacturer : 
SJS Cycles part number : 
Manufacturer part number : 
- Cartridge bearing
- 1" Italian size only
- English Threaded
- Classic steel threaded headset
- stack height - 34mm
- 30.2mm / 26.4
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Questions & Answers (7)
Question on sizes
30 Apr 2021
Hi, what do you mean by 1" Italian size? And what are the diameters of the top and bottom cups so I can check this will fit inside my head tube? Thanks
Thank you for your enquiry, they are 30.2mm

WD 30/04/21
does this headset have ec30 please?
15 Jan 2021
This is EC30.

Thanks 29.01.21
Does this come with classic ball bearings or with sealed cartridge bearings?
29 Nov 2019
This is fitted with sealed cartridge bearings.
Thanks - 02/12/19
Compatibilty issue
29 Mar 2019
I am restoring a 1976 Garelli Katia moped which may require the steering headset to be replaced. I am having difficulty in finding suitable bearings locally but have found the correct headset in USA (at some cost pp & vat) at
http://www.myronsmopeds.com/2015/05/steering/ (scroll down this page to 'Garelli' for details). Their ref is
25.4 x 1.06 (1.00?- 24.0 tpi), 30.2 cups
I believe the ref code is EC30/25.4-24tpi | EC30/26
Before placing an order can you confirm that your product above would meet this spec
David Peters
Without having the original in hand to check it, we are not able to confirm 100% as some measurements are not given. This is likely to be very close if not perfect.

Thanks - 01/04/19
re Dia-Comp Grand comp 1" italian threaded headset-what size is the crown race?
22 May 2018

Thank you for your enquiry, the crown race for this headset is 26.4mm. I hope this helps.

Kind Regards
Can I use this with 1 inch road bike and mtb or is it bmx
28 Mar 2018
Hi there,

You can use this with a road bike, mtb or bmx as long as the dimensions match up.

Cups, Bearings, Crown Race Included?
30 Mar 2015
Are headset cups that fit onto frame, bearings, and fork crown race included with the headset?

If not, can you suggest a compatible product to pair?

Thanks a lot.

Everything required for fitting (bearings, cups, crown race ETC.) is included in the package.